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Proceedings Paper

Embeddable distributed moisture and pH sensors for nondestructive inspection of aircraft lap joints
Author(s): Edgar A. Mendoza; Albert N. Khalil; Zongjian Sun; Daniel P. Robinson; Steven J. Syracuse; Claudio Oliveira Egalon; Michael F. Gunther; Robert A. Lieberman
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Paper Abstract

Two distributed fiber optic sensors for use in the prevention and monitoring of corrosion in aircraft are described. These sensors, based on optical fibers that are intrinsically sensitive to either water or changes in pH, will alert maintenance personnel to the presence of water in lap joints and other inaccessible critical areas. Furthermore, the sensors can also locate precisely where the moisture infiltration has occurred. In a typical application, a sensor fiber would be embedded in a lap joint along the bottom panel of an aircraft's body, or on a wing, where water is likely to collect. Changes in the optical transmission through the fiber can be monitored either periodically or continuously to determine the extent of water penetration.

Paper Details

Date Published: 7 July 1995
PDF: 11 pages
Proc. SPIE 2455, Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials, (7 July 1995); doi: 10.1117/12.213565
Show Author Affiliations
Edgar A. Mendoza, Physical Optics Corp. (United States)
Albert N. Khalil, Physical Optics Corp. (United States)
Zongjian Sun, Physical Optics Corp. (United States)
Daniel P. Robinson, Physical Optics Corp. (United States)
Steven J. Syracuse, Physical Optics Corp. (United States)
Claudio Oliveira Egalon, NASA Langley Research Ctr. (United States)
Michael F. Gunther, Virginia Polytechnic Institute and State Univ. (United States)
Robert A. Lieberman, Physical Optics Corp. (United States)


Published in SPIE Proceedings Vol. 2455:
Nondestructive Evaluation of Aging Aircraft, Airports, Aerospace Hardware, and Materials
Tobey M. Cordell; Raymond D. Rempt, Editor(s)

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